Fixes bug with erupt pushing direction

src/skill.c

@@ -974,12 +974,13 @@ skill_erupt(Skill *skill, SkillData *data)
 				gui_log("%s takes %d damage from the explosion", r->monster->label, result.dmg);
 				monster_set_bleeding(r->monster);
 
-				int lvl = 1 + player_has_artifact(player, PUSH_BACK);
+				int lvl = 2;//player_has_artifact(player, PUSH_BACK);
+				Vector2d dir = vector2d_to_direction(&VEC2D((float) i, (float) j));
 				monster_push(r->monster,
 					     player,
 					     rm,
-					     VEC2D((float) ((i > 0 ? 1 : -1) * lvl),
+					     VEC2D(dir.x * (float) lvl,
-						   (float) ((j > 0 ? 1 : -1) * lvl))
+						   dir.y * (float) lvl)
 					    );
 			}
 		}

src/vector2d.c

@@ -12,3 +12,25 @@ vector2d_is_opposite(Vector2d v1, Vector2d v2)
 	return ((v1.x > 0 && v2.x < 0) ^ (v1.y > 0 && v2.y < 0))
 		|| ((v1.x < 0 && v2.x > 0) ^ (v1.y < 0 && v2.y > 0));
 }
+
+Vector2d
+vector2d_to_direction(const Vector2d *vec)
+{
+	Vector2d new = VEC2D(vec->x, vec->y);
+
+	if (new.x > 0)
+		new.x = 1;
+	else if (new.x == 0)
+		new.x = 0;
+	else
+		new.x = -1;
+
+	if (new.y > 0)
+		new.y = 1;
+	else if (new.y == 0)
+		new.y = 0;
+	else
+		new.y = -1;
+
+	return new;
+}

src/vector2d.h

@@ -40,4 +40,7 @@ vector2d_equals(Vector2d, Vector2d);
 bool
 vector2d_is_opposite(Vector2d, Vector2d);
 
+Vector2d
+vector2d_to_direction(const Vector2d*);
+
 #endif // VECTOR2D_H_